We don't seem to have that kind of system. Short of impeachment - fat chance of that with the GOP in firm control of both house and senate - there isn't ever much likelihood of forcing out a president. Protests and uprisings could convince a president not to run for re-election- like LBJ - but Dubya is in the lame-duck phase anyway. Even with Nixon, it took two years- and impeachable offenses were already an issue before his re-election.

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